Add latest ruby and rails

.github/workflows/ruby.yml

@@ -11,15 +11,15 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [2.6, 2.7, truffleruby-head]
-        rails: [5.2.4.4, 6.0.3.4]
+        ruby: [2.6, 2.7, 3.0, 3.1, truffleruby-head]
+        rails: [5.2.6, 6.1.4.4, 7.0.1]
     env:
       RAILS_VERSION: ${{ matrix.rails }}
 
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
-      with: { ruby-version: 2.6 }
+      with: { ruby-version: 2.7 }
 
     - uses: actions/cache@v2
       id: cache